Patents by Inventor Jason Allen Wortham
Jason Allen Wortham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10852334Abstract: Embodiments of the present invention disclose methods and systems in a vehicle having high voltage (HV) for measuring isolation impedance in an EV or HEV utilizing an AC impedance measurement system. The method utilizes an extraction algorithm based on a Fourier transform to calculate phase and amplitude and then utilizes the calculated phase and amplitude to determine the isolation impedance. The isolation impedance comprises leakage resistance and total capacitance that are coupled in parallel between the high voltage system and the chassis. Embodiments of the present invention also provide a method and systems for component value self-calibration.Type: GrantFiled: September 11, 2014Date of Patent: December 1, 2020Assignee: MAXIM INTEGRATED PRODUCTS, INC.Inventors: Jiangang Liu, Jason Allen Wortham
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Patent number: 10139452Abstract: State based full and empty control for rechargeable batteries that will assure a uniform battery empty condition, even in the presence of a load on the battery. A fuel gauge provides a prediction of the open circuit voltage of the battery, and when the predicted open circuit voltage of the battery reaches the predetermined open circuit voltage of an empty battery, the load is terminated, after which the battery will relax back to the predetermined open circuit voltage of an empty battery. A similar technique is disclosed for battery charging, allowing faster battery charging without overcharging. Preferably an RC battery model is used as the fuel gauge to provide the prediction, but as an alternative, a coulomb counter may be used to provide the prediction, with error correction between successive charge discharge cycles.Type: GrantFiled: October 16, 2017Date of Patent: November 27, 2018Assignee: Maxim Integraqted Products, Inc.Inventor: Jason Allen Wortham
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Publication number: 20180038914Abstract: State based full and empty control for rechargeable batteries that will assure a uniform battery empty condition, even in the presence of a load on the battery. A fuel gauge provides a prediction of the open circuit voltage of the battery, and when the predicted open circuit voltage of the battery reaches the predetermined open circuit voltage of an empty battery, the load is terminated, after which the battery will relax back to the predetermined open circuit voltage of an empty battery. A similar technique is disclosed for battery charging, allowing faster battery charging without overcharging. Preferably an RC battery model is used as the fuel gauge to provide the prediction, but as an alternative, a coulomb counter may be used to provide the prediction, with error correction between successive charge discharge cycles.Type: ApplicationFiled: October 16, 2017Publication date: February 8, 2018Inventor: Jason Allen Wortham
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Patent number: 9791517Abstract: State based full and empty control for rechargeable batteries that will assure a uniform battery empty condition, even in the presence of a load on the battery. A fuel gauge provides a prediction of the open circuit voltage of the battery, and when the predicted open circuit voltage of the battery reaches the predetermined open circuit voltage of an empty battery, the load is terminated, after which the battery will relax back to the predetermined open circuit voltage of an empty battery. A similar technique is disclosed for battery charging, allowing faster battery charging without overcharging. Preferably an RC battery model is used as the fuel gauge to provide the prediction, but as an alternative, a coulomb counter may be used to provide the prediction, with error correction between successive charge discharge cycles.Type: GrantFiled: May 18, 2015Date of Patent: October 17, 2017Assignee: Maxim Integrated Products, Inc.Inventor: Jason Allen Wortham
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Patent number: 9787118Abstract: A balancing circuits and methods for hybrid batteries having two different rechargeable batteries that are coupled in series includes coupling a fuel gauge to each battery to determine the state of charge of each battery, comparing the state of charge of the two batteries, and if the state of charge of the two batteries is more than a predetermined difference, then enabling a switching converter to source current to a node between the batteries or to sink current from the node between the batteries, as required to tend to equalize the state of charge of the two batteries. Otherwise, if the state of charge of the two batteries is equal within a predetermined allowance, then disabling the switching converter.Type: GrantFiled: January 31, 2014Date of Patent: October 10, 2017Assignee: Maxim Integrated Products, Inc.Inventor: Jason Allen Wortham
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Patent number: 9535484Abstract: Methods of extending runtime with battery ripple cancellation in a CPU based system by providing a CPU that includes an input pin capable of throttling the power consumed by the CPU responsive to the input of a throttling signal, sensing a ripple in the form of a decrease in voltage or an increase in current responsive to a load on a CPU power supply, and when the ripple exceeds a predetermined limit, providing a throttling signal to the input pin to throttle the CPU to reduce the ripple.Type: GrantFiled: November 27, 2012Date of Patent: January 3, 2017Assignee: Maxim Integrated Products, Inc.Inventor: Jason Allen Wortham
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Publication number: 20150247902Abstract: State based full and empty control for rechargeable batteries that will assure a uniform battery empty condition, even in the presence of a load on the battery. A fuel gauge provides a prediction of the open circuit voltage of the battery, and when the predicted open circuit voltage of the battery reaches the predetermined open circuit voltage of an empty battery, the load is terminated, after which the battery will relax back to the predetermined open circuit voltage of an empty battery. A similar technique is disclosed for battery charging, allowing faster battery charging without overcharging. Preferably an RC battery model is used as the fuel gauge to provide the prediction, but as an alternative, a coulomb counter may be used to provide the prediction, with error correction between successive charge discharge cycles.Type: ApplicationFiled: May 18, 2015Publication date: September 3, 2015Inventor: Jason Allen Wortham
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Patent number: 9052368Abstract: Negative peak voltage detection for battery end of life estimations in fuel gauging is disclosed. Battery powered devices such cell phones and laptop computers create some noise in the form of negative excursions from the average output voltage of the battery which can cause the battery powered device to stop functioning. By negative peak detection relative to the average battery voltage, the end of life or discharged voltage condition can be altered in response to the negative peaks to obtain the maximum battery life without risk of the device inadvertently shutting down. Average output voltage of the battery may be taken as an estimated open circuit voltage or some other battery voltage. Various embodiments are disclosed.Type: GrantFiled: December 9, 2011Date of Patent: June 9, 2015Assignee: Maxim Integrated Products, Inc.Inventors: Jason Allen Wortham, Joseph Brian Vanden Wymelenberg, Kin Keung Lau
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Patent number: 9035616Abstract: State based full and empty control for rechargeable batteries that will assure a uniform battery empty condition, even in the presence of a load on the battery. A fuel gauge provides a prediction of the open circuit voltage of the battery, and when the predicted open circuit voltage of the battery reaches the predetermined open circuit voltage of an empty battery, the load is terminated, after which the battery will relax back to the predetermined open circuit voltage of an empty battery. A similar technique is disclosed for battery charging, allowing faster battery charging without overcharging. Preferably an RC battery model is used as the fuel gauge to provide the prediction, but as an alternative, a coulomb counter may be used to provide the prediction, with error correction between successive charge discharge cycles.Type: GrantFiled: December 5, 2011Date of Patent: May 19, 2015Assignee: Maxim Integrated Products, Inc.Inventor: Jason Allen Wortham
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Patent number: 8917032Abstract: Various embodiments of the invention allow for active AC ripple noise cancellation. In certain embodiments, noise cancellation is accomplished by modulating an LED driver output in a polarity opposite to the ripple, thereby, preventing interference with ripple-sensitive loads. Certain embodiments take advantage of a filter network to prevent the LED driver from modulating LED current in response to ripple that falls within a visible frequency range so as to prevent flicker in an LED backlight display. In addition to protecting ripple-sensitive loads from large ripple currents, efficiency is increased by reducing both I2·R losses and peak currents, thereby, extending the useful battery life time in mobile devices.Type: GrantFiled: February 19, 2013Date of Patent: December 23, 2014Assignee: Maxim Integrated Products, Inc.Inventors: Karl Richard Volk, Jason Allen Wortham
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Publication number: 20140145669Abstract: A balancing circuits and methods for hybrid batteries having two different rechargeable batteries that are coupled in series includes coupling a fuel gauge to each battery to determine the state of charge of each battery, comparing the state of charge of the two batteries, and if the state of charge of the two batteries is more than a predetermined difference, then enabling a switching converter to source current to a node between the batteries or to sink current from the node between the batteries, as required to tend to equalize the state of charge of the two batteries. Otherwise, if the state of charge of the two batteries is equal within a predetermined allowance, then disabling the switching converter.Type: ApplicationFiled: January 31, 2014Publication date: May 29, 2014Applicant: Maxim Integrated Products, Inc.Inventor: Jason Allen Wortham
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Patent number: 8717033Abstract: Integrated MOSFET current sensing for fuel-gauging. A 1st MOSFET through which the current is to be sensed is coupled to a 2nd MOSFET of the same type, the 2nd MOSFET being biased to have the same resistance as the 1st MOSFET. The 2nd MOSFET has a much smaller area than the 1st MOSFET, and is coupled to a current source representing a maximum current through the 1st MOSFET. The voltage across the 1st MOSFET relative to the voltage across the 2nd MOSFET provides a measure of the current through the 1st MOSFET. Various embodiments are disclosed, including embodiments in battery packs to eliminate the need for additional and expensive external components.Type: GrantFiled: September 19, 2011Date of Patent: May 6, 2014Assignee: Maxim Integrated Products, Inc.Inventors: David Harrington, Joseph B. Vanden Wymelenberg, Marvin Lyle Peak, Jr., Jason Allen Wortham
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Patent number: 8643331Abstract: Enhanced voltage-based fuel gauges and methods that increase the accuracy of voltage-based fuel gauges and allow the use of voltage-based fuel gauges to detect current, and particularly excessive current from a battery without the use of a sense resistor. When used with a coulomb counter, the outputs of a voltage-based fuel gauge and a coulomb counter may be combined in a manner that allows the combination to provide better performance that either alone may provide. Various embodiments and methods of operation are disclosed.Type: GrantFiled: June 13, 2012Date of Patent: February 4, 2014Assignee: Maxim Integrated Products, Inc.Inventors: Jason Allen Wortham, Parviz Ghaseminejad
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Patent number: 8502504Abstract: Model-based battery fuel gauges that connect across a rechargeable battery and track the per-cent state of charge of the battery. The model based fuel gauges provide a measure of the open terminal voltage of a battery, even when the battery is powering a load, to provide the state of charge information. Analog and digital implementations of the battery model fuel gauges may be used, and incorporated into a battery powered device in various ways, including constantly powered implementations and implementations that are turned on and off with the battery powered device. Various exemplary embodiments are disclosed.Type: GrantFiled: February 17, 2011Date of Patent: August 6, 2013Assignee: Maxim Integrated Products, Inc.Inventor: Jason Allen Wortham
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Publication number: 20130138984Abstract: Methods of extending runtime with battery ripple cancellation in a CPU based system by providing a CPU that includes an input pin capable of throttling the power consumed by the CPU responsive to the input of a throttling signal, sensing a ripple in the form of a decrease in voltage or an increase in current responsive to a load on a CPU power supply, and when the ripple exceeds a predetermined limit, providing a throttling signal to the input pin to throttle the CPU to reduce the ripple.Type: ApplicationFiled: November 27, 2012Publication date: May 30, 2013Inventor: Jason Allen Wortham
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Publication number: 20120153960Abstract: Negative peak voltage detection for battery end of life estimations in fuel gauging is disclosed. Battery powered devices such cell phones and laptop computers create some noise in the form of negative excursions from the average output voltage of the battery which can cause the battery powered device to stop functioning. By negative peak detection relative to the average battery voltage, the end of life or discharged voltage condition can be altered in response to the negative peaks to obtain the maximum battery life without risk of the device inadvertently shutting down. Average output voltage of the battery may be taken as an estimated open circuit voltage or some other battery voltage. Various embodiments are disclosed.Type: ApplicationFiled: December 9, 2011Publication date: June 21, 2012Applicant: MAXIM INTEGRATED PRODUCTS, INC.Inventors: Jason Allen Wortham, Joseph Brian Vanden Wymelenberg, Kin Keung Lau
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Patent number: 8203305Abstract: Enhanced voltage-based fuel gauges and methods that increase the accuracy of voltage-based fuel gauges and allow the use of voltage-based fuel gauges to detect current, and particularly excessive current from a battery without the use of a sense resistor. When used with a coulomb counter, the outputs of a voltage-based fuel gauge and a coulomb counter may be combined in a manner that allows the combination to provide better performance that either alone may provide. Various embodiments and methods of operation are disclosed.Type: GrantFiled: July 2, 2008Date of Patent: June 19, 2012Assignee: Maxim Integrated Products, Inc.Inventors: Jason Allen Wortham, Parviz Ghaseminejad
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Patent number: 8198863Abstract: Model-based battery fuel gauges that connect across a rechargeable battery and track the per-cent state of charge of the battery. The model based fuel gauges provide a measure of the open terminal voltage of a battery, even when the battery is powering a load, to provide the state of charge information. Analog and digital implementations of the battery model fuel gauges may be used, and incorporated into a battery powered device in various ways, including constantly powered implementations and implementations that are turned on and off with the battery powered device. Various exemplary embodiments are disclosed.Type: GrantFiled: October 22, 2007Date of Patent: June 12, 2012Assignee: Maxim Integrated Products, Inc.Inventor: Jason Allen Wortham
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Publication number: 20120139546Abstract: State based full and empty control for rechargeable batteries that will assure a uniform battery empty condition, even in the presence of a load on the battery. A fuel gauge provides a prediction of the open circuit voltage of the battery, and when the predicted open circuit voltage of the battery reaches the predetermined open circuit voltage of an empty battery, the load is terminated, after which the battery will relax back to the predetermined open circuit voltage of an empty battery. A similar technique is disclosed for battery charging, allowing faster battery charging without overcharging. Preferably an RC battery model is used as the fuel gauge to provide the prediction, but as an alternative, a coulomb counter may be used to provide the prediction, with error correction between successive charge discharge cycles.Type: ApplicationFiled: December 5, 2011Publication date: June 7, 2012Applicant: MAXIM INTEGRATED PRODUCTS, INC.Inventor: Jason Allen Wortham
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Publication number: 20120081125Abstract: Integrated MOSFET current sensing for fuel-gauging. A 1st MOSFET through which the current is to be sensed is coupled to a 2nd MOSFET of the same type, the 2nd MOSFET being biased to have the same resistance as the 1st MOSFET. The 2nd MOSFET has a much smaller area than the 1st MOSFET, and is coupled to a current source representing a maximum current through the 1st MOSFET. The voltage across the 1st MOSFET relative to the voltage across the 2nd MOSFET provides a measure of the current through the 1st MOSFET. Various embodiments are disclosed, including embodiments in battery packs to eliminate the need for additional and expensive external components.Type: ApplicationFiled: September 19, 2011Publication date: April 5, 2012Applicant: Maxim Integrated Products, Inc.Inventors: David Harrington, Joseph B. Vanden Wymelenberg, Marvin Lyle Peak, JR., Jason Allen Wortham